Machine for trimming stereoscope-hoods.



N0. 629,835. Patented Aug. I. I899. H. 0. WHITE 8. C. LEFFLEFL MACHINEFDR TBIIMMNG STEREOSCOPE H0008 (Application filed Sept. 16, 1897.)

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MACHINE FOR TRIMMING STERE'USCOPE HOODS.

(Agplication filed Sept. 16, 1897.; '(No Madal.) 4 Sheets-Sheet 3.

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Patented Aug. I, I899.

H. 0. WHITE & G. LE FFLER.

, MACHINE FOR TRIMIMNG STEBEOSGOPE HOBBS.

(Application filed Sept. 16, 1897. illolodel.) 4 Sheets-Sheet 4.

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UNITED STATES PATENT OFFICE.

HAWLEY 0. WHITE, OF NORTH BENNINGTON, VERMONT, AND CHARLES LEEELER, OFNEW YORK, N. Y., ASSIGNORS TO THE H. 0. WHITE oOM- PANY, OF NORTHBENNINGTON, VERMONT.

MACHINE FOR TRIMMING STEREOSCDPE-HOODS.

SPECIFICATION forming part of Letters Patent No. 629,836, dated August1, 1899.

Application filed September 16, 1897. Serial No. 651,850. (No model.)

To all whom, it may concern:

Be it known that we, HAWLEY 0. WHITE, residing at North Bennington, inthe county of Bennington and State of Vermont, and CHARLES LEFFLER,residing at New York, (Brooklyn,) in the county of Kings and State ofNew York, citizens of the United States, have invented certain new anduseful Improvements in Machines for Trimming Stereoscope-Hoods; and wedo hereby declare the following to be afull, clear, and exactdescription of the invention, suchas will enable others skilled. in theart to which it appertains to make and use the same.

This invention relates to machinery for automaticall y trimming theedges of stereoscopehoods to fit the human face. The style of hoods inmost common use at the present time are made of veneers or thin laminaeof wood laid up in glue with the grain of'the wood transversely crossedand are bent into the form of an elliptical cylinder. The trimming isaccomplished by meansof a central vertical block for holding the hood ofsuch dimensions that the hood maybe slipped down over the same, a seriesof sliding cutter-heads carrying properly-shaped knives orcutters, a

' corresponding series of guides upon which the cutters are mountedarrangedradially around the central block, and "a cam located beneaththe guides and revolving about a ver- 7 upper part of the machine.

tical axis concentric with the central block and adapted to cause thesaid cutter-heads to successively approach and recede from the centralblock by engaging projections on their lower sides, byaneans of whichmotion the knives are brought into contact with the hood and thetrimming is effected;

The above-mentioned elements, with their necessary accompaniments,together with suitable mechanism for driving the cam, coustitute ourinvention,"the' same being illus= trated by the accompanying drawings.

Figure '1" is a 'planview of the machine. Fig. 2 is a half sideelevation and half-section, taken on the line A B of Fig. 1, of theFigs. 3 and 4: are details of a clamp for holding the hood.

' Fig. 5 is an end elevation of the complete machine, the driving-pulleyonly being ofnit ted. Fig. 6 is a side elevation of some of I the partsfor controlling the driving devices, "of which Figs; 7, 8, 9, and 10 aredetails.

Fig.11 represents the hood to trim which the machine is designed. Fig.12 is an elevation ofone of the cutter-heads, together with its knifeand its canrengaging member.

Figs.

13 and 14 are respectivelyplan and elevation of the holder for thecentral block, which slightly-raised surface or boss is attached aholder 14: by means of screws 14*. Upon this holder rests the centralcutting-block 15, made of hard wood or iron and secured to 14 bydowel-pins 14 and stud 14, a loose collar 14 on upper end of 14 beingheld down against the block 15 by the washer 1-? and screw 14 Figs. 1,2, and 5'sl1ow the hood-blank 27 in place on the block 15. This hood isshown in detail in Fig..11,the dotted outlines representing the originalshape before triniming and the full lines the form for fitting aroundthe forehead and nose of the observer, to which shape it is cut by themachine. About the block 15 is cut a groove 15 of the same shape as thetrimmed edge of the hood. This groove is filled with some soft metal, aslead or Babbitt, which forms a backing for the severed edge of the hoodand also a stop against which the knives may impinge withoutinjury.Projections 15". carry this groove 15 slightly below the bottom of'theblock, so as to insure a perfect backing of the whole line of cut.Finger-recesses in the top-cornor of the block 15 facilitate the removalof the detached edging aftenthe -hood has been trimmed.

'At opposite ends of the longer diameter of the block 15 are levers 24cwith fulcra at 25, the levers at their inner ends entering notches l tprovided therefor in the holder lei and resting upon the bed 1 andhaving beneath their outer ends springs 26 to keep the inner endsidownin place upon the bed-plate. The

inner ends of these levers 24 act as stops or supports against which thehood is pressed when placed upon the block, and after the cut isfinished and the severed portion removed hand-pressure simultaneouslyapplied to the two outer ends of the levers raises the hood, so that itmay be grasped and removed by the fingers. Apair of clamping-jaws 20 and22, with tops curved approximate to and just below the line of out, arelocated opposite the fiat sides of the block for the purpose of clampingthe. hood firmly to the block. From the back of the jaw projects a rod21, which terminates at the back of the table in a rack 21, havingdownwardly-projecting teeth which engage the upperside of the pinion 17,as seen in Figs. 1 and 5. A similar rod 23 projects from the lower partof the jaw 22 and passes through a hole 14 in the blockholder 14 to theback of the table, where it terminates in a rack 23, which engages theunder side of the pinion 17, as in Figs. 1 and 5. By means of ahand-lever 19 upon the shaft 18 of the pinion 17 the clamps may be drawnup against the hood. A housing 16 projects upwardly from the table andforms a bearing for the pinion'shaft, as well as a guide for the racks.The lever 19 has a backwardly-projecting arm 19, which brings up againsta stop 19 when the lever is thrown clear back and the clamps are wideopen.

Five cutter-heads carrying knives are arranged about the cutting-block,as seen in Figs. 1, 2, and 5, each mounted upon sliding ways and adaptedto be moved back and forth thereon by the cam 28, located beneath thebed. These cutter-heads are all of similar construction, a detail inelevation of one of them being shown in Fig. 12. Asliding block 5,adapted to slide between the ways 3 3, has a vertical rib 5, between thehigh end of which and the inner raised end of the block fits aclamping-piece 8, screwed to the block 5 and carrying two horizontalset-screws, by means of which the endwise or forward projection of theknife may be adjusted. The knife 11, formed of fiat steel bent to theproper shape, rests upon the top of block 5 and is slotted for two maintightening-bolts, which pass downward through the knife into the block5. A vertical roller 13 is carried upon a downward projection of theblock 5 and engages the cam-race 28. The cutterheads (3 differ from 5only in being wider at the top for the knives 12 and also in havingthree tightening and adjusting bolts. The cutter-head 4, however,carries two vertical knives 10 10, as shown in Figs. 1, 2, and 5, and isdevoid of the vertical rib corresponding to 5 and 6, the method ofattaching its cutters being similar to 5 and G. The work done upon thehood by the several knives is shown in Fig. 11, in which the positionsfrom a to Z) are cutbyknives 10 10, bto cby knives 11 11, and c to d byknives 12.

Mounted beneath the table upon the shaft and carried by the bracket 33is a wheel composed of two partsthe cam-race 28 and a bevel-gear 29. Thebracket 33, which is bolted to the table, forms a bearin g for anothershaft 32, perpendicular to the shaft 30, to which are keyed abevel-pinion 31, which engages gear 29, and a clutch-collar 34.Acontinuously-driven pulley 36 is loosely mounted upon the outer end ofthe shaft 32, its motion being intermittently communicated to the shaft32 through radial clutch-teeth 37, Figs. 7, 8, and 9, on the inner endof the pulley-hub and a reciprocating tooth on the periphery of collar34. Upon the bracket 33, below the shaft 32, is secured a bracket 39,Figs. 6 and 10, which furnishes a bearing for a vertically-sliding cam38. This cam 38 is adapted to rise and enter the groove of collar 34 andthere acts to withdraw the tooth 35. The form of the top of the cam 38is shown by Fig. 9. As the collar 34 revolves the lip of tooth 35 firststrikes the cam at 38 being gradually withdrawn thereby until the toothend of 35 has entirely receded from engagement with the clutch-teeth 37when the lip strikes the stop 38 and further motion is prevented. Aspring 35 forces the tooth 35 into the clutch. At all times when the cam38 is outside of the groove 34 the tooth 35 is in engagement with theclutch, so that the connection is complete from the driving-pulley tothe cutter-knives. A rod 41 forms a downward continuation of the cam 38and is attached at its bottom end to a treadle 42, so that a downwardstroke of the treadle will cause corresponding depression of the cam 38,withdrawing it from the groove of collar 34. Two spiral springs namely,a long spring 43, connected from the table to the treadle, and a smallerone 40, acting between shoulders upon the cam 38 and stand -act to liftthe treadle, with the attached cam 38, and return the cam to groove of34. A latch is provided for holding the cam down and the springs undercompression, together with automatic means for releasing said latch atthe propertime, so that the cam may enter the groove and stop themachine. This releasing mechanism is shown in Figs. 1, 5, and 10, andconsists of a tripping-pin 51, suitably located on the outer face of thecamwheel 28. A cooperating cam-lever 45, fulcrumed at 40,with aconnecting-bar47 between and a crank 50, which, through a rockshaft 48and crank 49, forms a virtual bellcrank connection with a pin 44, whichpasses through the stand 39 and is adapted to enter a notch in the stemof cam 38, which notch comes opposite the pin only when the cam isdepressed. The weight 'of the connectingbar 47 acts to force the pin 44inwardly. Then when the cam is depressed the pin 44 enters the notch inthe stem of the cam 38 and holds the cam down until the tripping-pin 51comes around and through the lever 45 and connections withdraws the pin44, thus permitting the cam to rise and stop the machine.

Normally the cam is always in the groove of 34 and the machine at rest.

IIO

The operation of the machine is as follows: A hood-blank is slipped downover the cutting-block against the stop-levers 24, and the hand-lever 19is pulled over, thus clamping the blank, the hand being kept on thelever during all that follows until the cutting is completed. Thetreadle 42 is next depressed by the foot, thus releasing the tooth 35and starting the revolution of the cam-wheel 28. The cam-race willrevolve until the trippingpin 51, which from the previous operation willhave been left at rest just over the lever 45,, swings around and againtrips the lever,

stopping the machine. During this one revolution the cam brings eachcutter-head separately and successively up to the cuttingblock, thusmaking the several cuts upon the hood one at a time until at thecompletion of one revolution the cuts are all made and the machinestops. The hand-lever 19 is then swung back, so as to open the clamps.The severed waste edging is then lifted from the block with the fingers.The two levers 24 are then depressed,thus lifting the trim med hood, sothat its projecting edge may be grasped and the trimmed hood removed,when a new one may be blocked and the operation may be repeated.

We therefore claim as our invention the following: o

1. The combination in a stereoscope-hoodtrimming machine of a centrally-located hoodblank-supporting block, clamping devices forconfining the hood-blank to the block, a series of knife-edge cuttersfor acting on the blank arranged to move on lines radiating from theblock, and means for successively actuating said cutters to trim theblank.

2. The combination in a trimming-machine of a centrally-locatedhood-blank-supporting block, and a series of knife-edge cutters fortrimming the hood-blank arranged to move on lines radiating from theblock, and means for successively actuating said cutters to trim theblank.

3. The combination in a machine for trimming stereoscope-hoods, of ablank-support ing block, a series of ways radiating from said block uponwhich movable slides, each fitted with aknife-edge cutter, are adaptedto be reciprocated, a rotating device beneath said slides having asingle provision in connection with said slides for-individually andsuccessively actuating them one at a time to trim the hood-blank.

4. The combination in a machine for trim= ming stereoscope=hoods, of ahood-blank-supporting block, clamping devices for confining thehood-blank to the block, a series of sectional knife-edge cutters andmeans for actuating the same adapted to successively trim apart only ofthe edge of the blank at a time, and means for detaching the trimmedblank from the block after the completion of the trimming process.

In testimony whereof we affix our signatures in presence of twowitnesses.

HAWLEY 0. WHITE. CHAS. LEFFLER.

Witnesses as to White:

FRANKLIN Soo'r'r, VERA L. BULL.

' lVitnesses as to Leffier: WM. JANsoN, HENRY Bio.

